/*背景图*/

#background_image {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    overflow-y: auto;
    background-size: 20px 20px;
    background-image: linear-gradient( 90deg, rgba(37, 82, 110, 0.1) 1px, transparent 0), linear-gradient(180deg, rgba(37, 82, 110, 0.1) 1px, transparent 0);
}